Inner thread sizes range M3 to M10 standard metric specs
Every size matches its corresponding standard thread pitch
Knurled top outer edge for hand twisting without extra tools
Step cylinder shape for limiting position on assembled parts
وصف
Knurled outer increases friction for convenient hand adjustment
Different plating layers reduce direct contact between base metal and air
Neat inner thread connects evenly with matched standard machine screws
Step outline fits into prefabricated recessed holes of workpieces
Various sizes fit for instrument and small mechanical part installation